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sergij07 [2.7K]
3 years ago
6

Rational Equations help!

Mathematics
2 answers:
sattari [20]3 years ago
6 0

Answer:

D

Step-by-step explanation:

To find the length of board subtract the piece cut from the length of board

\frac{7}{x-2} - \frac{3}{x+2}

Before subtracting the fractions we require them to have a common denominator.

Multiply the numerator/denominator of the first fraction by (x + 2)

Multiply the numerator/denominator of the second fraction by (x - 2)

= \frac{7(x+2)}{(x-2)(x+2)} - \frac{3(x-2)}{(x-2)(x+2)}

Distribute the numerators leaving the denominator

= \frac{7x+14-3x+6}{(x-2)(x+2)}

= \frac{4x+20}{(x-2)(x+2)}

sladkih [1.3K]3 years ago
6 0
<h2>Answer:</h2>

<u>The correct option is</u><u> D</u>

<h2>Step-by-step explanation:</h2>

See the attached image for solution

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